mmc: dw_mmc-rockchip: fix failing to mount partition with "discard"

Without MMC_CAP_ERASE support, we fail to mount partition
with "discard" option since mmc_queue_setup_discard is limited
for checking mmc_can_erase. Without doing mmc_queue_setup_discard,
blk_queue_discard fails to test QUEUE_FLAG_DISCARD flag, so we get
the following log from f2fs(actually similar to other file system):

mounting with "discard" option, but the device does not support discard

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 536d7c2..6ce49a5 100644 (file)
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -234,11 +234,20 @@ static int dw_mci_rockchip_init(struct dw_mci *host)
        return 0;
 }
 
+/* Common capabilities of RK3288 SoC */
+static unsigned long dw_mci_rk3288_dwmmc_caps[4] = {
+       MMC_CAP_ERASE,
+       MMC_CAP_ERASE,
+       MMC_CAP_ERASE,
+       MMC_CAP_ERASE,
+};
+
 static const struct dw_mci_drv_data rk2928_drv_data = {
        .init                   = dw_mci_rockchip_init,
 };
 
 static const struct dw_mci_drv_data rk3288_drv_data = {
+       .caps                   = dw_mci_rk3288_dwmmc_caps,
        .set_ios                = dw_mci_rk3288_set_ios,
        .execute_tuning         = dw_mci_rk3288_execute_tuning,
        .parse_dt               = dw_mci_rk3288_parse_dt,